Vehicle Trim Panel Tab Retention for Airbag Deployment

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Solution Overview

Problem

Existing vehicle interior trim panels fail to maintain proper positioning and secure attachment to vehicle components during airbag deployment, particularly in pillar structures with curtain airbags, as conventional two-stage trim clips are inadequate.

Innovation Solution

A vehicle interior trim panel design featuring a main trim body with extendable tabs and retention members that securely attach to vehicle components, allowing the trim panel to release from the pillar while remaining partially attached during airbag deployment, utilizing a one-stage or two-stage clip structure and retention members for snap-fit engagement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a two-stage trim clip is used to allow airbag deployment, then the trim panel can release from the pillar, but the trim panel cannot maintain proper positioning and secure attachment to vehicle components

Engineering Contradiction:

Improveattachment reliabilityVSAvoidairbag deployment

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The attachment system is divided into two functional segments: a first attachment mechanism (such as a two-stage trim clip) that connects the trim panel to the pillar and allows controlled release during airbag deployment, and a second attachment mechanism (such as a retention member on the tab) that maintains secure connection to vehicle components. This segmentation allows each mechanism to perform its specific function independently, resolving the contradiction between allowing deployment and maintaining positioning.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The tab acts as an intermediary element between the trim panel body and the vehicle components. It provides a dedicated attachment interface that remains engaged with vehicle components during deployment, while the main trim panel body can release from the pillar. The tab's retention member serves as a mediator that maintains the connection, preventing complete separation while allowing the necessary movement for airbag deployment.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the trim panel completely separates from the pillar upon airbag deployment, then the airbag can deploy fully, but the trim panel loses all attachment and positioning

Engineering Contradiction:

Improveairbag deploymentVSAvoidtrim panel positioning

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The attachment system transitions from a static complete attachment state to a dynamic partial attachment state during deployment. The first attachment mechanism dynamically releases to allow deployment movement, while the second attachment mechanism dynamically maintains partial connection. This dynamic behavior enables the system to adapt between complete attachment for positioning and partial attachment for deployment freedom.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Different parts of the trim panel have different attachment qualities: the main body of the trim panel is designed to release completely from the pillar for full deployment, while specific tabs retain local attachment to vehicle components through retention members. This local quality differentiation allows the trim panel to have both freedom of movement where needed and stable positioning where required.

Inventive Principle:

Principle #3Local quality

3Stability of the object's composition

If the trim panel remains fully attached to the pillar, then proper positioning is maintained, but the airbag cannot deploy between the pillar and trim panel

Engineering Contradiction:

Improvetrim panel positioningVSAvoidairbag deployment obstruction

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The attachment system is segmented into a first attachment mechanism that connects to the pillar and a second attachment mechanism that connects to vehicle components. The first mechanism is designed to release during deployment to remove obstruction, while the second mechanism maintains positioning. This segmentation allows the trim panel to transition from a state that obstructs deployment to a state that allows deployment while maintaining positioning.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first attachment mechanism (such as the two-stage trim clip) is extracted or removed from the engaged state during airbag deployment, allowing the airbag to deploy freely between the pillar and trim panel. The second attachment mechanism remains engaged to maintain positioning. This extraction of the obstructing attachment element eliminates the harmful factor of deployment obstruction while preserving the beneficial positioning function.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS8303010B2Vehicle interior trim panel

Publication Date: 2012.11.06 NISSAN MOTOR CO LTD

AI summary

A vehicle interior trim panel is provided with a main trim body and a tab. The main trim body releasably covers at least a portion of a pillar of a vehicle, and includes a pillar facing surface, a passenger compartment facing surface, a top end and a bottom end. The tab extends from the bottom end of the main trim body to a free end and is received in a vehicle component. The tab includes a first face corresponding to the pillar facing surface of the main trim body, a second face corresponding to the passenger compartment facing surface of the main trim body, a peripheral edge surrounding the first and second faces of the tab, and a retention member formed on the peripheral edge of the tab. The retention member retains the tab to the vehicle component while the main trim body is released from the pillar.